My first two mollies ate most of their fry until another member here told me to feed them more often. I was only feeding the adults once a day. I moved up to feeding three times a day and they stopped eating their fry. I just raised a batch in the same tank with three adult and all the fry made it. I never had nay luck with breeder nets or moving the fry. They always died from the stress. Feed more often, provide lots of hiding places, and you should have a lot survive. The babies really like floating plants wit large root systems and moss piles. I put wads of extra moss in the corners of my tank and all the babies hide there when startled.